Adaptive beam forming method based on coprime array

An adaptive beam and array technology, applied in the field of signal processing, can solve problems such as degradation, inability to fully utilize the properties and output performance of co-prime arrays

Inactive Publication Date: 2017-10-27
ZHEJIANG UNIV
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an adaptive beamforming method based on a coprime array in order to solve the problem that the existing adaptive beamforming method cannot make full use of the properties of the coprime array and the decline in output performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adaptive beam forming method based on coprime array
  • Adaptive beam forming method based on coprime array
  • Adaptive beam forming method based on coprime array

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0103] Simulation example 1: The spatial power spectrum corresponding to the direction of arrival and power value estimated in the present invention is compared with the spatial power spectrum obtained by the Capon method using a coprime array and a uniform linear array of 10 antenna physical array elements. Figure 4 shown. The signal-to-noise ratio of the desired signal is 20dB, and the number of sampling snapshots is L=30. It can be seen that the method proposed in the present invention can effectively estimate the direction of arrival and power value of the desired signal and each interference signal, and the power estimation effect is better than the Capon method. Although there are two additional estimated signal sources, which are caused by the unknown number of interference sources in advance, their power estimates are extremely low, and they only occupy a very small proportion in the process of interference-plus-noise covariance matrix reconstruction. The perturbatio...

example 2

[0104] Simulation example 2: The performance comparison between the output signal-to-interference-noise ratio of the method proposed in the present invention and the existing adaptive beamforming method in the case of random direction error of the signal is as follows Figure 5 and Figure 6 As shown, the comparison methods include: sampling covariance matrix inversion method, diagonal loading method, subspace-based method, worst-case performance optimization method, and covariance matrix reconstruction method. It is assumed that both the desired signal and the interference signal have a random error that satisfies the uniform distribution of [-4°, 4°], that is, the direction of arrival of the desired signal is randomly generated within the range of [1°, 9°], and the waves of the two interference signals Arrival directions are randomly generated in the ranges of [-54°, ​​-46°] and [-24°, -16°] respectively. The angle domain range of the desired signal is Φ=[θ s -5°, θ s +5°...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an adaptive beam forming method based on a coprime array and mainly solves the problems that the existing technology cannot fully utilize the characteristics of the coprime array and the output performance degrades. The method comprises the following implementation steps of (1) structuring the coprime array on a base station end; (2) decomposing the coprime array into a pair of coprime sparse uniform linear subarrays; (3) utilizing receiving signals of the decomposed coprime sparse uniform linear subarrays to carry out direction of arrival estimation; (4) constructing power estimation based on joint optimization of a covariance matrix of the pair of coprime sparse uniform linear subarrays; (5) reconstructing an expected signal steering vector; (6) reconstructing an interference and noise covariance matrix; and (7) designing a beam forming weight vector. The method fully utilizes the coprime characteristics included by the coprime array to realize the precise parameter estimation and reconstructs major parameters of the beam forming weight vector, so that the output performance of an adaptive beam former is effectively improved and the method can be used for directional sending and reception of a signal.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to beamforming of radar signals, acoustic signals and electromagnetic signals, in particular to an adaptive beamforming method based on a coprime array, which can be used for directional transmission and reception of signals. Background technique [0002] Beamforming is an important branch in the field of array signal processing. Taking the receiving end as an example, beamforming uses the combination of antenna technology and various digital signal processing technologies to accumulate the weights of the signals received by multiple antenna elements to enhance the array gain of the desired signal and suppress interference and noise. Adaptive beamforming can adjust the beamforming weight vector according to the external environment to ensure the stability and robustness of the system. It has important application value in the fields of radar, sonar, voice and w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617
Inventor 史治国周成伟贺诗波陈积明
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap